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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. halftwo

    Furthest distance birds that can be identified?

    Interestingly on patch in summer watching Hobbies disappearing in the distance we estimated (v roughly based on speed estimate x time) and reckoned they were visible at more than six miles, however, if we had seen the speck at that range, rather than watched it into distance, it wouldn't have...
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